Utilities are interested in identifying parts of the existing distribution network that can be converted to microgrids via economically viable retrofitting.
 This is because DERs cannot supply local loads during an outage if adequate control and protection schemes are not in place. Hence, optimally splitting a network into microgrids constitutes a pertinent  planning problem [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}. This optimal distribution network partitioning (ODNP) task seeks to identify potential self-adequate sub-networks that can survive the loss of the main grid as islands. Both exact [1]}, [3]}, [2]}, [5]}, [4]} and heuristic [7]}, [8]}, [6]}, [9]} methods have been proposed for ODNP. Self-adequacy in the objective function has been surrogated by either expected power flow on microgrid boundary lines [8]}, [7]}, [5]}, [9]}, or expected load-generation imbalance within microgrids [1]}, [3]}, [2]}, [5]}, [4]}, [6]}.
Moreover, dynamic identification of boundary lines in response to faults have also been proposed [4]}, [5]}.
A method for determining self-sufficient islands in transmission networks is described in [31]}, but cannot be directly extended to ODNP without including distribution system specific constraints.
